关键词: 复杂地质体, 断层位置判断, 表面模型提取

Abstract: 3D geological modeling technology is applied more and more widely in the process of oil and gas exploration and development. Pillar grid provides a method which can describe reservoir fluid flow, as the basic structure of 3D geological volume has been applied in existing 3D geological modeling software. The surface model of 3D geological volume can display geological tectonics more intuitively, so the surface model extraction algorithm of 3D geologic volume based on pillar grid has great utility value in geologic modeling. This paper proposes a surface extraction algorithm by parsing 3D geological data based on pillar grid, which puts forward its surface model and visualization. This algorithm mainly implements the surface extraction of complex 3D geological volume based on pillar grid, including the surface extraction method of 3D modeling without faults and the surface extraction method of 3D modeling with complex faults. Through the actual data validation, this algorithm can implement surface model extraction of complex 3D geological volume, meeting practical requirements and value.

Key words: complex geologic volume, fault location estimation, surface model extraction